Gamedesign

Also 2 days a go we had game design. Our teecher had a interesting lesson for us. We have to make a game with a black brick and a red brick and red or black has to come to the other side in a save way, while the other color is blocking. Now we have to make an idea to make it exciting and simple, BUT most of all it has to work only then is the task complete feel free to help me out this time.